"SIR-A: 1982". NASA. Archived from the original on February 8, 1997. Retrieved June 22, 2013. This article incorporates text from this source, which is in the public domain.
historycollection.jsc.nasa.gov
"[1]" NASA Johnson Space Center Oral History Project June 3, 2004, Retrieved July 17, 2013 This article incorporates text from this source, which is in the public domain.
Fries, Colin (June 25, 2007). "Chronology of Wakeup Calls"(PDF). NASA. Archived from the original(PDF) on December 20, 2023. Retrieved August 13, 2007. This article incorporates text from this source, which is in the public domain.
"SIR-A: 1982". NASA. Archived from the original on February 8, 1997. Retrieved June 22, 2013. This article incorporates text from this source, which is in the public domain.
Fries, Colin (June 25, 2007). "Chronology of Wakeup Calls"(PDF). NASA. Archived from the original(PDF) on December 20, 2023. Retrieved August 13, 2007. This article incorporates text from this source, which is in the public domain.